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<head>
  <title>MSE: truncating the media seeks to end of media and update buffered range</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="mediasource.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<pre id="test">
<script class="testbody" type="text/javascript">

// This test append data to a mediasource and then seek to half the duration
// of the video.
// We then shorten the video to 1/3rd of its original size.
// We ensure that the buffered range immediately reflect the truncation
// and that we've seeked to the new end of the media as per W3C spec and
// video.currentTime got updated.

SimpleTest.waitForExplicitFinish();

function round(n) {
  return Math.round(n * 1000) / 1000;
}

function do_seeking(e) {
  var v = e.target;
  v.removeEventListener("seeking", do_seeking, false);
  SimpleTest.finish();
}

function do_seeked(e) {
  var v = e.target;
  v.removeEventListener("seeked", do_seeked, false);
  var duration = round(v.duration / 3);
  is(v._sb.updating, false, "sourcebuffer isn't updating");
  v._sb.remove(duration, Infinity);
  once(v._sb, "updateend", function() {
    v._ms.duration = duration
    // frames aren't truncated, so duration may be slightly more.
    isfuzzy(v.duration, duration, 1/30, "element duration was updated");
    v._sb.abort(); // this shouldn't abort updating the duration (bug 1130826).
    ok(v.seeking, "seeking is true");
    // test playback position was updated (bug 1130839).
    is(v.currentTime, v.duration, "current time was updated");
    is(v._sb.buffered.length, 1, "One buffered range");
    // Truncated mediasource duration will cause the video element to seek.
    v.addEventListener("seeking", do_seeking, false);
  });
}

function do_loaded(e) {
  var v = e.target;
  v.removeEventListener("loadeddata", do_loaded, false);
  // mp4 metadata states 10s when we only have 1.6s worth of video.
  v._sb.remove(v._sb.buffered.end(0), Infinity);
  once(v._sb, "updateend", function() {
    v._ms.duration = v._sb.buffered.end(0);
    is(v.duration, v._ms.duration, "current time updated with mediasource duration");
    v.currentTime = v.duration / 2;
    is(v.currentTime, v.duration / 2, "current time was updated");
    ok(v.seeking, "seeking is true");
    v.addEventListener("seeked", do_seeked, false);
  });
}

runWithMSE(function (ms, v) {
  ms.addEventListener("sourceopen", function () {
    var sb = ms.addSourceBuffer("video/mp4");
    v._sb = sb;
    v._ms = ms;

    fetchWithXHR("bipbop/bipbop2s.mp4", function (arrayBuffer) {
      sb.appendBuffer(new Uint8Array(arrayBuffer));
      v.addEventListener("loadeddata", do_loaded, false);
    });
  });
});

</script>
</pre>
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